Current conditions

:Product: Geophysical Alert Message wwv.txt
:Issued: 2025 Dec 12 0305 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
#
#          Geophysical Alert Message
#
Solar-terrestrial indices for 11 December follow.
Solar flux 146 and estimated planetary A-index 26.
The estimated planetary K-index at 0300 UTC on 12 December was 4.00.

Space weather for the past 24 hours has been minor.
Geomagnetic storms reaching the G1 level occurred.

Space weather for the next 24 hours is predicted to be minor.
Geomagnetic storms reaching the G1 level are expected.
Radio blackouts reaching the R1 level are likely.

wwv alert messages

Last 25 or 250 wwv alert messages.

Solar activity and geomagnetic forecast

Geomagnetic 3 days forecast for high latitudes

planetary index (K)

UTC	00-03	03-06	06-09	09-12	12-15	15-18	18-21	21-00
2025 Dec 11	1	2	3	4	4	3	2	2
2025 Dec 12	3	2	2	5	4	4	3	2
2025 Dec 13	2	2	3	3	3	3	3	2

Probability of Geomagnetic conditions at high latitudes

	Active	Minor_Storm	Major-Severe_Storm
2025 Dec 11	15	25	25
2025 Dec 12	15	25	25
2025 Dec 13	15	30	50

Geomagnetic 3 days forecast for mid latitudes

planetary index (K)

UTC	00-03	03-06	06-09	09-12	12-15	15-18	18-21	21-00
2025 Dec 11	1	2	2	2	2	2	2	2
2025 Dec 12	3	2	2	3	2	2	3	3
2025 Dec 13	2	2	2	2	2	2	3	3

Probability of Geomagnetic conditions at mid latitudes

	Active	Minor_Storm	Major-Severe_Storm
2025 Dec 11	20	5	1
2025 Dec 12	20	5	1
2025 Dec 13	40	20	5

24-hour forecast of a polar cap absorption (PCA) event

Green
No active sunspot region on the Sun is likely to produce a PCA event in the 24 hours.

Computed daily at 23h00Utc from datas issued from SEC.
f5len.org (c 2004-2010)

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